Re: [gitgitgadget/git] Adding git-ignore command, tests, and documentation. (#264)

[Thurston Stone <tstone2077@protonmail.com>]

> Wouldn't this simpler to type and less error prone, as you do
> have to
>	$ cd path/to/the
>	... work in that deep
>	... realize that file.txt in that directory needs ignoring ...
>	$ echo file.txt > .gitignore
that would have "path/to/the/.gitignore" which contains "file.txt".
Whereas that does work fine, it can be cumbersome to manage a multitude
gitignore files (it can get out of hand). If a policy is in place to
consolidate this management into the root gitignore, they'd have to run:

$ cd path/to/the
	... work in that deep directory ...
	... realize that file.txt in that directory needs ignoring ...
	... know relative path of both desired ignore file and cwd ...
$ echo path/to/the/file.txt > ../../../.gitignore
	... or with this script ...
$ git ignore path/to/the/file.txt

Another example might be when the code is deeper embeded, like a
java library path.
$ cd code/src/com/mylib
	... work under that directory ...
	... realize subclass/helpers/testdata.json needs ignoring ...
 	... need to know the full path of ignore file, cwd, and
		the relative path to root gitignore ...
$ echo code/src/com/mylib/subclass/helpers/testdata.json > ../../../../.gitignore
- or the more intuitive: -
$ git ignore subclass/helpers/testdata.json
- both ending in the same result
$ cat ${REPO_ROOT}/.gitignore
code/src/com/mylib/subclass/helpers/testdata.json